300 THE JOURNAL OF BOTANY 



with sixteen genera — Liagora, Polyides, Digenea, Ptilota, Thmt- 

 masia, Bhodomela, Chondria, Basia, Sphcerococciis, Tliamnoplwra, 

 Grateloiqjia, Haly^rienia, Bonnemaisonia, Amansia, Delesseria, 

 Oneillia ; but Ceramium, Griffitlisia, Chconpia, Chatospora, Hiit- 

 cJiinsia, Rliytiphloea^ are sandwielied between Chara and Ecfocarpusl, 

 Lemanea is placed with the Fucoids, and Batrachosjyermitm with 

 Mesogloia. Curiously enough, Greville^, as late as 1830, still keeps 

 the tradition of the diehotoraous Polgides and Furcellaria as near 

 Dictyota dicliotoma, and beyond the pale of the true Floridese, not- 

 withstanding the brightness of the crimson coloration of his plate -. 



The accumulation of genera and species, and the marking out of 

 the main series by differentiation of somatic organization, was the 

 work of the collectors and svsteniatists, more particularly of the first 

 half of the XlXth Century; cf. Lightfoot (1777), Hudson (1768), 

 Goodenough and Woodward (1795), Yelley (1795), Stackhouse 

 (1795), Dawson Turner (1808), Dillvyyn and Hooker (1809) ; cf. 

 Literature in IIisto7^ical Sketch of the Bhteophycece, loc. cit. p. 268, 

 as also Brodie, Borrer, Lilly Wigg, Templeton, Drummond, Car- 

 michael, Boswarva, Dickie, man}^ of whose names remain allocated to 

 species of the FlorideiB, and others still more familiar in generic 

 guise: — Pollexsen {Pollexfcnia), Ealfs (SaJfsia), Hore (Horea), 

 Landsborough (Landshiirgia), Mrs. Gulson (Gulsonia), Mrs. Gatty 

 (Gattya), Miss Gifford [Gifordi a), Miss Cutler {Outleria), Mis*s 

 Hutchins {Kntchinsia) with Mrs. Griffiths (Gri^'thsia) and her 

 friend Mrs. Wyatt, jointly responsible for the Algce Damnoniensis 

 (Torquay, 1840) 4 yols., as an exsiccata of 234 specimens checked 

 by Mrs. Griffths. 



In more recent times this work has been amplified for British 

 coasts by Buffc'ham (tl896; JBuffhamia, Holmes {HoJmesia) and 

 more particularly by E. A. L. Batters (f 1907 ; Battersia), whose 

 list of British Marine Algae (Journ. Bot., Supp. 1902) remains the 

 standard authority, and Trail (f 1919 ; Trailiella). 



For this country the work culminates in the two volumes of 

 the Bhycologici Britannica of Harvey (1845-1851) containing 

 descriptions and coloured plates of 182 species, arranged in 52 genera 

 and 7 orders. As works of the same epoch may be included : — 

 Species, Genera et Ordines Florideao'um of J. Agardh (Lund, 

 1851-1876), Iconogrcrphica Bhycologia Adriatica of Zanardini 

 (Venice, 1860), audi Phycologia Mcditerranea of Ardissone (1883). 



To the collectors of the early part of the Nineteenth Century 

 is larg-dy due the rapid growth in the study of algaj which marks 

 t'le difference between the works of Haryey (1851), Fhycologia 

 Britannica, Nereis Bor. Amer. (1851), Bhycolog. Anstralica (1858- 

 63), and the volumes of Stackhouse and Dawson Turner. Outside 

 the range of the Flowering Plants and Ferns, no other group of the 

 veo-etable kingdom has been so popularized as the Floridea^, in this 



^ Greville (Edinburgh, 1830), Algx Britannicas. 



2 For the older restriction of the order ' Florideae,' cf. Harvey (1841) Manual 

 of British Algae ; Porplnjra remains associated with Ulva in the Phyc. Brit. (92), 

 as also Banjia (9G); and Enjthrotrichia (322). 



